My new fella is around 10 weeks old now and showing me some signs of aggression that has got me a bit worried. Perhaps this is typical puppy/breed behavior and some of you can give me ideas to set me at ease. This dogs hunting stock is infallable, however, his disposition is from word of mouth only. The short of it is that he seems to be possesive of his toys--especially after a retrieve. In terms of B.O., he is at sit. After a few minutes of working on sit I end it with alittle playful retrieving. Upon return, when I go to grab the retrieved item, he usually emits a growl--usually just little puppy growling. At times, with myself and others, even in a non-retrieval/training situation, this growl has become more than just puppy stuff. Several times it has been a downright snarl. Now puppy growling for play I will put up with and dismiss, but teeth showing snarling is followed by a swat across the nose. After this he is submissive. Also, when playing with my father-in-law's Golden, when its time to go I have to pick him up. Soon as my hand is at his breast he is growling like he is pissed. Am I over-thinking this and buying into breed reputation? Do I have a legitimate concern? Your input is appreciated.